Water pumping device by using pressure differential

ABSTRACT

A water pumping device includes a water storage tank, a water tower, a pressure differential pump, and two pumping pipes. The pressure differential pump includes two opposite cylinders, two pistons, a connecting rod, two equivalent-diameter retractable air pipes, and two air control valves. Thus, the air pipes are expanded by the compressed air from the air control valves, and the two pistons are movable reciprocally in the cylinders by driving of the air pipes to introduce the water in the water storage tank through the pumping pipes into the water tower in an alternating manner so as to pump and supply the water into the water tower successively.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates to a pumping device and, more particularly, to a water pumping device for pumping water.

2. Description of the Related Art

A conventional water pump is used to pump water from a water storage tank into a water tower that is located above the water storage tank. Thus, the water from the water storage tank is delivered into the water tower which supplies the water into the house for use with the people. However, the conventional water pump consumes a lot of electric power, thereby wasting the energy. In addition, the conventional water pump stops operating when the electric power supply is interrupted, so that the water from the water storage tank cannot be pumped into the water tower, thereby causing inconvenience to the user.

BRIEF SUMMARY OF THE INVENTION

In accordance with the present invention, there is provided a water pumping device, comprising a water storage tank, a water tower located at a height greater than that of the water storage tank, a pressure differential pump mounted between the water storage tank and the water tower to deliver water contained in the water storage tank into the water tower, and two pumping pipes each connected between the water tower and the pressure differential pump.

The pressure differential pump includes two opposite cylinders separated from each other, two pistons each mounted in a respective cylinder to define the respective cylinder into an air pressure chamber and a water storage chamber and each movable in the respective cylinder reciprocally to introduce the water in the water storage tank into the water storage chamber of the respective cylinder and to compress the water in the water storage chamber of the respective cylinder through a respective pumping pipe into the water tower, a connecting rod mounted between the pistons to move with the pistons so that the pistons are movable simultaneously, two equivalent-diameter retractable air pipes each expandably mounted in the air pressure chamber of a respective cylinder and each having a first end mounted on the respective cylinder and a second end mounted on the respective piston, and two air control valves each mounted on a respective cylinder and each connected to an expandable air compartment of a respective air pipe to introduce an ambient air into the air compartment of the respective air pipe to produce a pressurizing mode to expand the respective air pipe to push the respective piston toward the water storage chamber of the respective cylinder.

The primary objective of the present invention is to provide a water pumping device by using a pressure differential.

Another objective of the present invention is to provide a water pumping device, wherein the air pipes are expanded by the compressed air from the air control valves, and the two pistons are movable reciprocally in the cylinders by driving of the air pipes to introduce the water in the water storage tank through the pumping pipes into the water tower in an alternating manner so as to pump and supply the water into the water tower successively.

A further objective of the present invention is to provide a water pumping device, wherein the water in the water tower falls downward through the water outlet pipe to impact the hydraulic generator so as to provide an electric power generating function.

A further objective of the present invention is to provide a water pumping device, wherein the compressed air is supplied by the pressure compressor or air tank which uses the waste or residual gas from a factory.

Further benefits and advantages of the present invention will become apparent after a careful reading of the detailed description with appropriate reference to the accompanying drawings.

BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWING(S)

FIG. 1 is a front cross-sectional view of a water pumping device in accordance with the preferred embodiment of the present invention.

FIG. 2 is a schematic operational view of the water pumping device as shown in FIG. 1.

FIG. 3 is a schematic operational view of the water pumping device as shown in FIG. 2.

FIG. 4 is a schematic operational view of the water pumping device as shown in FIG. 3.

FIG. 5 is a front cross-sectional view of a water pumping device in accordance with another preferred embodiment of the present invention.

FIG. 6 is a front cross-sectional view of a water pumping device in accordance with another preferred embodiment of the present invention.

FIG. 7 is a front cross-sectional view of a water pumping device in accordance with another preferred embodiment of the present invention.

DETAILED DESCRIPTION OF THE INVENTION

Referring to the drawings and initially to FIG. 1, a water pumping device in accordance with the preferred embodiment of the present invention comprises a water storage tank 4, a water tower 1 located at a height greater than that of the water storage tank 4, a pressure differential pump 2 mounted between the water storage tank 4 and the water tower 1 to deliver water contained in the water storage tank 4 into the water tower 1, and two pumping pipes 3 each connected between the water tower 1 and the pressure differential pump 2.

The water tower 1 is provided with a water outlet pipe 13 connected to a hydraulic generator 14 and a water outlet valve 12 connected between the water outlet pipe 13 and the water tower 1. The hydraulic generator 14 is located at a height smaller than that of the water tower 1. The water tower 1 is further provided with a plurality of water pipe connectors 11. The water storage tank 4 is provided with a water inlet pipe 41 to introduce water into the water storage tank 4.

The pressure differential pump 2 includes two opposite cylinders 20 separated from each other, two pistons 200 each mounted in a respective cylinder 20 to define the respective cylinder 20 into an air pressure chamber 22 and a water storage chamber 201 and each movable in the respective cylinder 20 reciprocally to introduce the water in the water storage tank 4 into the water storage chamber 201 of the respective cylinder 20 and to compress the water in the water storage chamber 201 of the respective cylinder 20 through a respective pumping pipe 3 into the water tower 1, a connecting rod 29 mounted between the pistons 200 to move with the pistons 200 so that the pistons 200 are movable simultaneously, two equivalent-diameter retractable air pipes 230 each expandably mounted in the air pressure chamber 22 of a respective cylinder 20 and each having a first end mounted on the respective cylinder 20 and a second end mounted on the respective piston 200, and two air control valves 26 each mounted on a respective cylinder 20 and each connected to an expandable air compartment 23 of a respective air pipe 230 to introduce an ambient air into the air compartment 23 of the respective air pipe 230 to produce a pressurizing mode to expand the respective air pipe 230 to push the respective piston 200 toward the water storage chamber 201 of the respective cylinder 20.

In the preferred embodiment of the present invention, the cylinders 20 of the pressure differential pump 2 are mounted in the water storage tank 4. Each of the cylinders 20 of the pressure differential pump 2 has an open end portion closed by a cover 27. The water storage chamber 201 of each of the cylinders 20 is separated from the air pressure chamber 22 by the respective piston 200 and is connected between the water storage tank 4 and the respective pumping pipe 3. Each of the air control valves 26 of the pressure differential pump 2 is provided with an air inlet tube 25 to introduce the ambient air into the air compartment 23 of the respective air pipe 230 and an air outlet tube 24 to introduce the air in the air compartment 23 of the respective air pipe 230 outwardly.

The pressure differential pump 2 further includes two water inlet non-return valves 210 each mounted on a respective cylinder 20 and each connected between the water storage tank 4 and the water storage chamber 201 of the respective cylinder 20, two water outlet non-return valves 21 each mounted on a respective cylinder 20 and each connected between the respective pumping pipe 3 and the water storage chamber 201 of the respective cylinder 20, an air filling valve 271 mounted on one of the cylinders 20 and connected to the air pressure chamber 22 of the respective cylinder 20 to fill a determined amount of compressed air into the respective air pressure chamber 22, a connecting pipe 220 connected between the air pressure chambers 22 of the cylinders 20 so that the air pressure chambers 22 of the cylinders 20 are disposed at an equilibrium pressure balance state, and two bushings 290 each mounted in the water storage chamber 201 of a respective cylinder 20 and each mounted on the connecting rod 29 to facilitate movement of the connecting rod 29.

In operation, referring to FIGS. 1 and 2, the water is introduced through the water inlet pipe 41 into the water storage tank 4. Then, the air filling valve 271 fills a determined amount of compressed air into the respective air pressure chamber 22 so that the air pressure chambers 22 of the cylinders 20 are disposed at an equilibrium pressure balance state as shown in FIG. 1.

In practice, the ambient air is introduced from the air inlet tube 25 of the right-sided one of the air control valves 26 into the air compartment 23 of the respective air pipe 230 to produce a pressurizing mode to expand the respective air pipe 230 to push the respective piston 200 toward the water storage chamber 201 of the respective cylinder 20 to compress the water in the water storage chamber 201 of the respective cylinder 20 and to open the respective water outlet non-return valve 21 so that the water is pushed through the respective pumping pipe 3 into the water tower 1 as shown in FIG. 2. At this time, the respective water inlet non-return valve 210 is closed under the pressure. In addition, the connecting pipe 220 is connected between the air pressure chambers 22 of the cylinders 20 so that the air in the left-sided one of the air pressure chambers 22 is introduced through the connecting pipe 220 into the right-sided one of the air pressure chambers 22. In addition, when the left-sided one of the air pipes 230 is compressed by the respective piston 200, the air in the air compartment 23 is introduced outwardly through the air outlet tube 24 of the left-sided one of the air control valves 26 to produce a depression mode. At this time, when the left-sided one of the air pipes 230 is compressed by the respective piston 200, a vacuum suction is produced to close the respective water outlet non-return valve 21 and to open the respective water inlet non-return valve 210 to introduce the water from the water storage tank 4 into the left-sided one of the water storage chambers 201 as shown in FIG. 2.

Referring to FIGS. 2 and 3, the ambient air is introduced from the air inlet tube 25 of the left-sided one of the air control valves 26 into the air compartment 23 of the respective air pipe 230 to produce a pressurizing mode to expand the respective air pipe 230 to push the respective piston 200 toward the water storage chamber 201 of the respective cylinder 20 to compress the water in the water storage chamber 201 of the respective cylinder 20 and to open the respective water outlet non-return valve 21 so that the water is pushed through the respective pumping pipe 3 into the water tower 1 as shown in FIG. 3. At this time, the respective water inlet non-return valve 210 is closed under the pressure. In addition, the connecting pipe 220 is connected between the air pressure chambers 22 of the cylinders 20 so that the air in the right-sided one of the air pressure chambers 22 is introduced through the connecting pipe 220 into the left-sided one of the air pressure chambers 22. In addition, when the right-sided one of the air pipes 230 is compressed by the respective piston 200, the air in the air compartment 23 is introduced outwardly through the air outlet tube 24 of the right-sided one of the air control valves 26 to produce a depression mode. At this time, when the right-sided one of the air pipes 230 is compressed by the respective piston 200, a vacuum suction is produced to close the respective water outlet non-return valve 21 and to open the respective water inlet non-return valve 210 to introduce the water from the water storage tank 4 into the right-sided one of the water storage chambers 201 as shown in FIG. 3.

Thus, the two pistons 200 are movable reciprocally in the cylinders 20 by driving of the equivalent-diameter retractable air pipes 230 to introduce the water in the water storage tank 4 through the pumping pipes 3 into the water tower 1 in an alternating manner so as to pump the water into the water tower 1 successively.

As shown in FIG. 4, when the water outlet valve 12 is opened, the water in the water tower 1 falls downward through the water outlet pipe 13 to impact the hydraulic generator 14 so as to provide an electric power generating function.

As shown in FIG. 5, at least one of the water pipe connectors 11 is connected to a water supply tube 18 for use with the people.

As shown in FIG. 6, the cylinders 20 of the pressure differential pump 2 are spaced from the water storage tank 4, and the water storage chamber 201 of each of the cylinders 20 is connected to the water storage tank 4 by a water outlet pipe 42.

As shown in FIG. 7, the water pumping device further comprises a boost pressure controller 5 connected to the air inlet tube 25 and the air outlet tube 24 of each of the air control valves 26 of the pressure differential pump 2 to provide air inlet and air outlet functions, and a pressure compressor (or air tank) 6 connected to the boost pressure controller 5 to supply the compressed air to the boost pressure controller 5.

Accordingly, the air pipes 230 are expanded by the compressed air from the air control valves 26, and the two pistons 200 are movable reciprocally in the cylinders 20 by driving of the air pipes 230 to introduce the water in the water storage tank 4 through the pumping pipes 3 into the water tower 1 in an alternating manner so as to pump and supply the water into the water tower 1 successively. In addition, the water in the water tower 1 falls downward through the water outlet pipe 13 to impact the hydraulic generator 14 so as to provide an electric power generating function. Further, the compressed air is supplied by the pressure compressor or air tank 6 which uses the waste or residual gas from a factory.

Although the invention has been explained in relation to its preferred embodiment(s) as mentioned above, it is to be understood that many other possible modifications and variations can be made without departing from the scope of the present invention. It is, therefore, contemplated that the appended claim or claims will cover such modifications and variations that fall within the true scope of the invention. 

1. A water pumping device, comprising: a water storage tank; a water tower located at a height greater than that of the water storage tank; a pressure differential pump mounted between the water storage tank and the water tower to deliver water contained in the water storage tank into the water tower; two pumping pipes each connected between the water tower and the pressure differential pump; wherein the pressure differential pump includes: two opposite cylinders separated from each other; two pistons each mounted in a respective cylinder to define the respective cylinder into an air pressure chamber and a water storage chamber and each movable in the respective cylinder reciprocally to introduce the water in the water storage tank into the water storage chamber of the respective cylinder and to compress the water in the water storage chamber of the respective cylinder through a respective pumping pipe into the water tower; a connecting rod mounted between the pistons to move with the pistons so that the pistons are movable simultaneously; two equivalent-diameter retractable air pipes each expandably mounted in the air pressure chamber of a respective cylinder and each having a first end mounted on the respective cylinder and a second end mounted on the respective piston; two air control valves each mounted on a respective cylinder and each connected to an expandable air compartment of a respective air pipe to introduce an ambient air into the air compartment of the respective air pipe to produce a pressurizing mode to expand the respective air pipe to push the respective piston toward the water storage chamber of the respective cylinder.
 2. The water pumping device in accordance with claim 1, wherein the cylinders of the pressure differential pump are mounted in the water storage tank.
 3. The water pumping device in accordance with claim 1, wherein each of the cylinders of the pressure differential pump has an open end portion closed by a cover.
 4. The water pumping device in accordance with claim 1, wherein the water storage chamber of each of the cylinders is separated from the air pressure chamber by the respective piston.
 5. The water pumping device in accordance with claim 1, wherein the water storage chamber of each of the cylinders is connected between the water storage tank and the respective pumping pipe.
 6. The water pumping device in accordance with claim 1, wherein each of the air control valves of the pressure differential pump is provided with an air inlet tube to introduce the ambient air into the air compartment of the respective air pipe and an air outlet tube to introduce the air in the air compartment of the respective air pipe outwardly.
 7. The water pumping device in accordance with claim 1, wherein the pressure differential pump further includes: two water inlet non-return valves each mounted on a respective cylinder and each connected between the water storage tank and the water storage chamber of the respective cylinder; two water outlet non-return valves each mounted on a respective cylinder and each connected between the respective pumping pipe and the water storage chamber of the respective cylinder.
 8. The water pumping device in accordance with claim 1, wherein the pressure differential pump further includes: an air filling valve mounted on one of the cylinders and connected to the air pressure chamber of the respective cylinder to fill a determined amount of compressed air into the respective air pressure chamber.
 9. The water pumping device in accordance with claim 1, wherein the pressure differential pump further includes: a connecting pipe connected between the air pressure chambers of the cylinders so that the air pressure chambers of the cylinders are disposed at an equilibrium pressure balance state.
 10. The water pumping device in accordance with claim 1, wherein the pressure differential pump further includes: two bushings each mounted in the water storage chamber of a respective cylinder and each mounted on the connecting rod to facilitate movement of the connecting rod.
 11. The water pumping device in accordance with claim 1, wherein: the water tower is provided with a water outlet pipe connected to a hydraulic generator and a water outlet valve connected between the water outlet pipe and the water tower; the hydraulic generator is located at a height smaller than that of the water tower.
 12. The water pumping device in accordance with claim 1, wherein the water tower is provided with a plurality of water pipe connectors;
 13. The water pumping device in accordance with claim 12, wherein at least one of the water pipe connectors is connected to a water supply tube.
 14. The water pumping device in accordance with claim 1, wherein the cylinders of the pressure differential pump are spaced from the water storage tank.
 15. The water pumping device in accordance with claim 14, wherein the water storage chamber of each of the cylinders is connected to the water storage tank by a water outlet pipe.
 16. The water pumping device in accordance with claim 1, wherein the water storage tank is provided with a water inlet pipe to introduce water into the water storage tank.
 17. The water pumping device in accordance with claim 6, further comprising: a boost pressure controller connected to the air inlet tube and the air outlet tube of each of the air control valves of the pressure differential pump to provide air inlet and air outlet functions; a pressure compressor connected to the boost pressure controller to supply the compressed air to the boost pressure controller.
 18. The water pumping device in accordance with claim 1, wherein the two pistons are movable reciprocally in the cylinders by driving of the equivalent-diameter retractable air pipes to introduce the water in the water storage tank through the pumping pipes into the water tower in an alternating manner so as to pump the water into the water tower successively. 